It's a Jar file. What ever the hell that means. When you try and launch TS,...a window pops open that says Java Virtual machine Launcher at the top with an error message inside that states:If you have Windows 7 or later, it automatically makes backups of the registry and system files IF you had the backup feature enabled. Even if you didn't have the feature turned on, the event log would capture the error message and tell you which file caused the error. Replace bad file with a known good copy and you are fixed.
FYI: this is the sort of thing that I have been doing for a living for the last 16 years or so. PM me for help if you are interested.
Error: invalid or corrupt jarfile TunerstudioMS.jar